Photographer Ralph Lee Hopkins is the founder and director of the onboard photography program for the National Geographic-Lindblad Expeditions fleet. For more than 20 years, he has photographed expeditions from the Arctic to the Antarctic and points in between.Mr. Hopkins completed his master's degree in Geology at Northern Arizona University in Flagstaff, where he studied rocks along the rim of the Grand Canyon. He was a photographer on the 1990 Colorado River Expedition with the U.S. Geological Survey, and he continues to lead photo expeditions down the Colorado River.Mr. Hopkins's photography appears regularly in National Geographic publications. A member of the International League of Conservation Photographers, his current work focuses on documenting conservation and environmental issues in the Galapagos Islands, Ecuador, Baja California, and the Sea of Cortes in Mexico.Mr. Hopkins is author and photographer of the popular guidebooks Hiking Colorado's Geology and Hiking the Southwest's Geology. His most recent book is Nature Photography: Documenting the Wild World.